DC Independence Day Fireworks Trigger World-Record Air-Quality Spike

TL;DR
Washington, DC briefly logged the world’s worst air quality for a major city after an 850,000-shell Independence Day fireworks show, with PM2.5 levels spiking to about 6.7 times pre-fireworks and all city sensors reporting air unhealthy for sensitive groups. The peak occurred around 4am, but thunderstorms helped limit the worst impact. The event, organized byFreedom 250, comes amid broader pollution-control rollbacks championed by the Trump administration.
- Washington records world’s worst air quality for a city after 850,000 Fourth of July fireworks The Guardian
- Trump’s Fireworks Spectacle Sent D.C.’s Air Pollution to ‘Unhealthy’ Levels The New York Times
- D.C. suffers from a July 4 hangover after 250 extravaganza Axios
- DC's air quality returns to moderate as haze from America 250 fireworks begins to clear WUSA9
- See how bad the air quality in D.C. really got after the Freedom 250 fireworks The Washington Post
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